package com.itheima.dao;

import com.itheima.domain.Teacher;

import java.util.ArrayList;

public interface ITeacherDao {

    //增
    void  addTeacher(Teacher teacher);
    //删
    void deleteTeacher(String sid);

    //改
    void updateTeacher(String sid, Teacher newTea);

    //查
    ArrayList<Teacher> findAllTeachers();
    
    // 根据条件查   根据学号找索引 
    int  getIndex(String sid);
    
}
